PE(Poly propylene)

 

Density is 0.96 g/cm³, temperature -70°C+65°C

It combines the superior properties of most plastics, boasting the highest values ​​currently available for six characteristics: impact resistance, wear resistance, chemical corrosion resistance, self-lubrication, and impact energy absorption.

1. High Wear Resistance: Among all engineering plastics, UHMW-PE exhibits the best wear resistance, making it particularly noteworthy. Higher molecular weight materials are more wear-resistant, even surpassing many metal materials (such as carbon steel, stainless steel, and bronze). For example, UHMW-PE pipes, under conditions of strong corrosion and high wear, have a service life 4-6 times longer than steel pipes, while also increasing conveying efficiency by 20%, fully demonstrating its advantages of “energy saving, environmental protection, economy, and high efficiency.”

2. Corrosion Resistance: It is unaffected by alkaline solutions, can be used in concentrated acids at 80°C, and is stable in 75% concentrated sulfuric acid and 20% nitric acid. It is also stable to seawater and liquid detergents.

3. Extremely low coefficient of friction: With a static coefficient of friction of 0.07, it exhibits excellent self-lubricating properties, making it an ideal material for bearings, bushings, sliders, and linings. Using UHMW-PE as the friction component of equipment not only improves wear resistance and lifespan but also achieves energy savings.

4. Impact resistance: It boasts the highest impact resistance among plastics. Whether subjected to strong external impacts or internal pressure fluctuations, it is difficult to crack. Its impact strength is 10 times that of Nylon 66, 20 times that of PVC, and 8 times that of PTFE. Especially in low-temperature environments, its impact strength reaches its highest value. Its flexibility provides an extremely safe and reliable guarantee for the conveying coefficient.

5. Aging resistance: It has stable performance and excellent aging resistance. It can be used both above ground and underground, and will not age for 50 years. According to ASTM methods (load 4.6 kg/cm), the heat distortion temperature is 85°C, and the operating temperature can reach 90°C. Under special circumstances, it can be used at even higher temperatures without showing signs of brittleness. However, it has a high coefficient of linear expansion and poor thermal conductivity, so this must be carefully considered during product design. 6. Electrical Properties: High resistivity, breakdown voltage up to 50KV/mm, and dielectric constant of 2.3, making it suitable for use as a structural material in electrical engineering over a wide temperature and frequency range.

7. Hygienic and Non-toxic: UHMW-PE is tasteless, non-toxic, odorless, and non-corrosive, possessing physiological inertness and adaptability.

8. Suitable for use as a conveyor belt material in low-temperature or refrigerated transport environments.

PP(Polyethylene)

 

Density is 0.91 g/cm², applicable temperature range: +5°C to +105°C.

It has a lower specific gravity than water, is non-toxic, insulating, resistant to strong acids and alkalis, and exhibits excellent corrosion resistance.

When the ambient temperature is below 10°C, avoid impact on the conveyor belt.

 

POM(Acetal)

 

Density: 1.41 g/cm³

Applicable temperature range: -45°C to +85°C. Polyoxymethylene (POM) plastic possesses excellent mechanical properties, including good tensile strength, rigidity, impact strength, creep resistance, elasticity, fatigue resistance, abrasion resistance, and lubricity. It is resistant to solvents, oils, weak acids, and alkalis, making it suitable for conveying heavy objects in low-temperature environments. In Southeast Asia, it is commonly known as “plastic steel.”

 

PA6(Nylon)

 

Density: 1.13 g/cm³, applicable temperature range: -60°C to +100°C

Outstanding wear resistance: Its coefficient of friction is typically 0.1-0.3, about 1/4 that of phenolic plastics and 1/3 that of Babbitt metal. Therefore, it is a self-lubricating material.

Good mechanical properties: It has high surface hardness, high tensile strength, flexural strength, impact strength, and high ductility. Used in gears and parts for chemical, beverage, food, and corrosion-resistant equipment.

Excellent chemical stability: It is unaffected by chemicals such as weak alkalis, alcohols, esters, copper, hydrocarbons, and oils.

Broad cold and heat resistance: It maintains certain mechanical strength at -60°C and has a heat resistance temperature of 80-100°C.

Lightweight: Its specific gravity is above that of water.

Nylon, as a widely used engineering plastic, is widely used in machinery, automobiles, electrical appliances, textile equipment, chemical equipment, aerospace, metallurgy, and other fields. Nylon has become an indispensable structural material in various industries, with the following main characteristics: 1. Excellent mechanical properties. Nylon has high mechanical strength and good toughness.

2. Good self-lubricating and friction resistance. Nylon has excellent self-lubricating properties and a low coefficient of friction, thus resulting in a long service life for transmission components.

3. Excellent heat resistance. Highly crystalline nylons such as Nylon 46 have very high heat distortion temperatures and can be used for extended periods at 150°C. PA66, after glass fiber reinforcement, has a heat distortion temperature exceeding 250°C.
4. Excellent electrical insulation properties. Nylon has high volume resistivity and high breakdown voltage, making it an excellent electrical and electronic insulation material.

5. Excellent weather resistance.

6. Water absorption. Nylon has high water absorption, with a saturated water absorption rate exceeding 3%. This can affect the dimensional stability of manufactured parts to some extent.